Cannot exclude temperature param (it is unsupported by OpenAI o1)

[sansari]

Describe the bug
When using OpenAI's o1 model (e.g. o1-2024-12-17), the temperature param is not supported. However, if you want to use the chat method and pass no temperature, it's not currently possible, due to the fallback to DEFAULTS:

To Reproduce

chat(messages: [...], model: "o1-2024-12-17", temperature: nil)
chat(messages: [...], model: "o1-2024-12-17")

Both of the above will end up using the DEFAULTS temperature value which is setup inside the internals of the library and cannot be easily overridden.

Expected behavior
We probably want something similar to this in how it removes the dimension parameter for a particular model: https://github.com/patterns-ai-core/langchainrb/blob/main/lib/langchain/llm/openai.rb#L86

Screenshots

Desktop (please complete the following information):

• OS: Linux
• Ruby version 3.3.5
• Langchain.rb version 0.19.2